TANGO is an object oriented control system for Linux and Windows. It provides a framework in C++, Java and Python for implementing distributed control objects an accessing them via a well-defined API.
This sourceforge project a

BioMa is a specimen based Biodiversity database Manager. It is designed to store, organize, and manipulate biodiversity-related scientific data, either for the purposes of museums, scientific collections, or research projects.

C.U.O.N. is an ERP System for Linux-Server with Clients running on Linux, Windows and other OS. Articles, Support Tickets, Projects, Orderbook,Accounting, Mindmap, Document Management System. Special Modul exists also for Gardening Center.

UPDATE: Chromium is no longer updated or maintained. The project is frozen.
Chromium is a flexible framework for scalable real-time rendering on clusters of workstations, derived from the Stanford WireGL project code base.